package org.example.SingletonPattern;

/**
 * 单例模式的实现方式: 懒汉式，线程安全
 */
public class Singleton2 {
    private static Singleton2 instance;
    private Singleton2(){}
    public static synchronized Singleton2 getInstance() {
        if (instance == null) {  
            instance = new Singleton2();
        }  
        return instance;  
    }  
}